[TowerTalk] 80M Inverted V - CW and SSB

Jim W7RY w7ry at centurytel.net
Wed Oct 23 00:27:58 EDT 2013


Is there a 64 bit version of *DIPCAGE2.EXE?

Thanks
73
Jim W7RY

*
On 10/22/2013 5:56 PM, Bryan Swadener wrote:
> My 4-wire cage inv vee was cheap and easy to build.
> It's a proven design (W1AW has been using one
> for decades).
>   
> While the free design program on smeter.net gives
> all the data, even using the simple dipole formula
> gets you there. Mine's a bit long, and the VSWR
> curve is shifted below the middle of the band (around
> 3600-3625 KHz).  I expect if I optimized mine for
> 3750 KHz, VSWR would be no worse than around 1.5:1.
> See the curve here: http://tinyurl.com/wa7prc-cage-vswr
>   
> I've had one for 80m up close to 10 years, continuously.
> It has survived MANY windstorms. I now also drive it
> on 160m as a vertical against ground; the inv vee legs
> work as a top hat.
>   
> I also use the design during FD. Even though there is
> 500 feet of wire in it, it goes up and comes down FAST.
>   
>   
>   
>   
> vy 73,
> Bryan WA7PRC
>
>
> ________________________________
> Date: Mon, 21 Oct 2013 20:19:05 -0700
> From: W7ZZ
> Subject: [TowerTalk] 80 meter inverted V -- CW and SSB
>
> N6RY and I designed, built and tested a truly broadband 80 meter dipole
> that offers SWR of 1.5:1 or better across 99% of the entire band, with
> the 1% being at 1.6:1 and at the absolute top of the band.  We wrote an
> article on the antenna that had been accepted by CQ Magazine for
> publication but got "preempted" when QST, by sheer coincidence, ran an
> article on a very similar design while the CQ editing process was under way.
>
> This antenna has been up and in operation at my station for a couple
> years now at 80 feet. It is a fantastic performer. The EZNEC files model
> a refined version at 80' (mine was an early beta version but it works so
> well I never bothered to build our final version), 60' and at 35'. The
> dimensions of the antenna and the series match change at each height.  I
> also have a 40m version up with even better results in terms of both SWR
> and performance. It is at about 80 feet also (with the models at 35, 60
> and 80feet).  I have had up a 20m version which also performed as
> predicted by EZNEC.  We designed a 160 version that, while much better
> than a regular dipole, isn't anywhere near as good as the 80-10m versions.
>
> Let me know if you're interested. 73, W7ZZ
>
> ------------------------------
>
> Date: Mon, 21 Oct 2013 20:44:56 -0700
> From: W7ZZ <>
> Subject: [TowerTalk] 80 meter broadband dipole article
>
> By the way, I forgot to mention but was reminded when someone mentioned a
> double bazooka antenna in their message, this antenna is as efficient as
> an ordinary dipole at the same height. Most other broadband designs are
> either difficult to build, prone to failure in the real, windy world or
> inefficient (or all of the above).  This antenna, built as recommended,
> is pretty easy to build, tough and highly efficient.
>
> W7ZZ
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